UK home secretary urges access to London attacker's WhatsApp

British Home Secretary Amber Rudd wants WhatsApp to give intelligence agencies access to encrypted messages following last week's Westminster attack that left four dead.

Appearing on the BBC's "The Andrew Marr Show", Rudd also called for social media giants to ensure that they don't "provide a secret place for terrorists to communicate with each other." She plans to meet with social media companies later this week to seek their help in fighting terrorism, according to Bloomberg.

Police have reportedly discovered that the Westminster attacker, Khalid Masood, connected to WhatsApp three minutes before the attack. But they don't know the contents of any messages that he may have sent or received. This is because all messages sent on WhatsApp have end-to-end encryption, which means someone needs direct access to the device to read them.